LLCLOOP(ADMP)                      UNIX System V



     Name
          llcloop - software loopback network interface


     Syntax
          #include <sys/socket.h>
          #include <netinet/in.h>
          struct sockaddrin sin;

          s = socket(AFINET, SOCKXXX, 0);
          .
          .
          .
          sin.sin_addr.s_addr = hton1 (INADDR_ANY);
          bind(s, (char *)&sin, sizeof(sin));



     Description
          The llcloop interface is a software loopback mechanism which
          may  be  used  for  performance  analysis, software testing,
          and/or  local  communication.    As   with   other   network
          interfaces,   the   loopback  interface  must  have  network
          addresses assigned for each address family with which it  is
          to be used.  (Currently, only the Internet address family is
          supported.) These addresses may be set or changed  with  the
          SIOCSIFADDR  ioctl.   The  loopback  interface should be the
          first  one  configured,  otherwise  nameserver  lookups  for
          hostnames of other interfaces may fail.


     Files
          /dev/llcloop


     See Also
          intro(ADMP), inet(ADMP).


     (printed 8/17/89)                          LLCLOOP(ADMP)